MBM29F002BC Fujitsu Media Devices, MBM29F002BC Datasheet - Page 18

• Manufacturer Part Number: MBM29F002BC
• Description: 2M (256K X 8) BIT
• Manufacturer: Fujitsu Media Devices

18
MBM29F002TC
DQ
Sector Erase Timer
DQ
Toggle Bit II
Notes: 1. These status flags apply when outputs are read from a sector that has been erase-suspended.
Program
Erase
Erase Suspend Read (1)
(Erase-Suspended Sector)
Erase Suspend Program
After the completion of the initial sector erase command sequence the sector erase time-out will begin. DQ
remain low until the time-out is complete. Data Polling and Toggle Bit I are valid after the initial sector erase
command sequence.
If Data Polling or the Toggle Bit I indicates the device has been written with a valid erase command, DQ
be used to determine if the sector erase timer window is still open. If DQ
erase cycle has begun; attempts to write subsequent commands (other than Erase Suspend) to the device will
be ignored until the erase operation is completed as indicated by Data Polling or Toggle Bit I. If DQ
the device will accept additional sector erase commands. To insure the command has been accepted, the system
software should check the status of DQ
were high on the second status check, the command may not have been accepted.
Refer to Table 7: Hardware Sequence Flags.
This toggle bit II, along with DQ
Algorithm or in Erase Suspend.
Successive reads from the erasing sector will cause DQ
the device is in the erase-suspended-read mode, successive reads from the erase-suspended sector will cause
DQ
address of the non-erase suspended sector will indicate a logic “1” at the DQ
DQ
Program operation is in progress. The behavior of these two status bits, along with that of DQ
as follows:
For example, DQ
DQ
Furthermore, DQ
mode, DQ
3
2
2
6
6
2. These status flags apply when outputs are read from the byte address of the non-erase suspended sector.
to toggle. When the device is in the erase-suspended-program mode, successive reads from the byte
is different from DQ
does not). See also Table 7 and Figure 15.
2
toggles if this bit is read from the erasing sector.
Mode
2
2
and DQ
can also be used to determine which sector is being erased. When the device is in the erase
2
6
in that DQ
can be used together to determine the erase-suspend-read mode (DQ
-55/-70/-90
6
, can be used to determine whether the device is in the Embedded Erase™
6
toggles only when the standard program or Erase, or Erase Suspend
3
prior to and following each subsequent sector erase command. If DQ
DQ
DQ
DQ
0
1
7
/MBM29F002BC
(2)
7
7
2
to toggle during the Embedded Erase™ Algorithm. If
toggles
toggles
toggles
DQ
1
3
6
is high (“1”) the internally controlled
2
bit.
-55/-70/-90
7
toggles
toggles
, is summarized
1 (2)
DQ
2
1
toggles while
3
is low (“0”),
2
3
may
3
will
3